js cookie记住密码

// 设置Cookie
function setCookie(name, value, days) {
    var expires = "";
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toUTCString();
    }
    document.cookie = name + "=" + (value || "") + expires + "; path=/; Secure; SameSite=Lax";
}

// 获取Cookie
function getCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

// 使用示例
document.getElementById('loginButton').addEventListener('click', function() {
    var username = document.getElementById('username').value;
    var password = document.getElementById('password').value;
    setCookie('username', username, 7); // 记住用户名7天
    // 注意：密码不应直接存储在Cookie中，应使用安全的认证机制
});